Imagine a silent world beneath the ocean, where darkness stretches for miles and the only clues about what lurks below come ...

Take a look at the incredible barreleye fish and learn why they have a transparent forehead and glowing green eyes.

Rinse the fish and dry it with a clean dishcloth. Spread a layer of salt at least 1/2-inch thick in a container. Lay pieces of fish on top so that none of them are touching. Cover the pieces of ...

They have scaly skin that helps them to move through the water and fins that help them swim. Fish lay eggs in the water and can be small, like tiny minnows or gigantic, like huge sharks!

As for iridescence, river catfish have no scales, but their delicate skin is covered with a protective layer of slime that gives them a shiny glow. These fish are threatened with habitat ...